HP Compatible Transceiver 1000BASE-LX/LH SFP transceiver module for SMF, 1300-nm wavelength The SFP transceiver modules are hot-pluggable I/O devices that plug into module sockets. The transceiver connects the electrical circuitry of the module with the optical or copper network. You can use any combination of SFP modules that your HP device supports. The only restrictions are that each port must match the wavelength specifications on the other end of the cable and that the cable must not exceed the stipulated cable length for repable communications. You may use HP Compatible Transceiver SFP transceiver modules on your HP device. Each SFP transceiver module has an internal serial EEPROM that is encoded with security information. This encoding allows HP to identify and vapdate that the SFP transceiver module meets the requirements for the device.